Fluid-pressure controller



V. VEENSCHOTEN. FLUID-PRESSURE CONTROLLER.

APPUCATION FlLED JULY29,19I8.

Patented Sept. 26,- 1922.

Patented Sept, 2%, i922,

VINfillillll' li. V. VEENSCHOTEN, 0F ERIE, PENNSYLVANIA, ASSIGNQR T0 NORTHERN EQUIPMENT COMPANY, 0F ERIE, PENNSYLVANIA, A CORLDRA'I'EUN SF PENN- sans/aura.

FLUED-PBESSURE CONTROLLER.

To all whom'it may concern: 7

Be it known that l, VINCENT V. Vannsono'rnn, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Fluid- Pressure Controllers, of which the follow ing is a specification.

his invention relates to controllers adapted to operate devices according to the varying pressure of fiuid. It has for its object the production of a controller which will be affected by fluid under pressure so as to produce a movement of some movable part of the controller, depending upon the amount of pressure applied, and adapted to operate a device according to the movement obtained.

Although the controller is applicable to many other uses, yet, I prefer to describe it as applied to a feed-water regulator system of a boiler, and particularly to the type of feed-water regulator herein described and illustrated, for the reason that this regulator supplies a varying fluid pressure.

In the accompanying drawings Fig. 1 is an elevation, more or less diagrammatic, of a boiler feed-water regulator system embodying features of my invention. Fig. 2 is a central sectional view of the controller which I have invented, and the feed-water valve operated thereby. Fig. 3 is an elevation of the controller; and Fig. is a central sectional view' of the feed-water regulator of the System.

lihe controller comprises a resilient cylinder 5. This cylinder may be made of any suitable material, I prefer rubber for the purpose. Une end of the cylinder is hermetically closed by means of the disk 6, ring 7, and the bolts 8, and the other end of the cylinder may be closed in any suitable manner, such as by the rubber cylinder end shown in Fig. 2, and it is supported by the disk 9. The cylinder and disks are encircled in a resilient coil 10, the sides of the cylinder being in contact with the coil, and being supported thereby. The coil-is made of square wire, so that the rubber will be supported better thereby. The coil is positioned between the plates 11 and 12.

late 12, by means of the rods 13, is fixed to the cross bar 14, which is fixed to, or integral with, the tube 15, which, in turn, is fixed to, orintegral with, the disk 6.

By this arrangement the disk 3 and the plate 12 are rigidly connected.

. Projecting upwardly from the tube 15' is a pipe 16 leading to the feed-water regulator 17 and projecting downwardly from the disk 9 is a rod 18 fixed to-the cross bar 19; and the cross bar 19, by means of the rods 20, has a fixed spaced relation with the disk 11. Coupled to the bar 18 is a valve stem 21 which is'adapted to operate the plunger 22 in the Valve 23. The controller plate 12 is fixed to the valve casing by means of the bars 24.

A consideration of the structure will show that, as fluid pressure is exerted on the interior of the cylinder 5, the cylinder will force downwardly the disk 9 and, hence, will tend to force downwardly the plunger 22 towards the open position. lhe cross bar 19 will also be forced downwardly, but, by means of the rods 20 and plate 11, will be opposed by the compression of the coiled spring 10. On the other hand, as the fluid pressure in the cylinder decreases, the coil spring will gradually force upwardly the plate 11, and hence will tend to bring the plunger back to its closed position,

The regulator 17 is adapted to produce pressure in the cylinder as follows: the reg-- ulator comprises a tube 25, which is connected, by means of pipes 26 and 27, above and below the water level of the boiler 28. The tube 25 therefore has more or less steam in its upper end and water in its lower end, depending upon the elevation of the water level in the boiler. Enclosing this tube 25 is a tube 29 partly filled with water 30, and the tube 16 connects the tube 29 with the cylinder 5. As the water, in the boiler sinks, steam will be generated in the tube 29, due to the steam in the tube 25, and the pressure of the steam generated will depend upon the elevation of the water in the tube 25. Thus the pressure of the steam generated, and hence the fiuid pressure in the cylinder 5, will depend more or less upon the elevation of the water in the boiler; and this pressure in turn, as-explained-above, by means of the controller cylinder, will determine the position of the plunger 22, and hence the flow of water to the boiler through the feed-water valve 23, causing the elevation of the Water-level in the boiler to vary according to the requirements.

In practice, it is desired to have the water tee tltl

' phragm,'instead of a resilient c linder, pro

duces a limited movement. l ith my controller, however, a longer and more gradual movement of the operating member is produced, and, hence, a more desirable movement of the valve plunger results.

Attention is called to my copending application Serial No. 254,284, filed Sept. 16,

'1918, which sets up a structure somewhat similar to that shown and described herein, the claims of which, however, are directed to features other than those towards which the following claims are directed.

I claim as my invention:

1. A controller comprising an elastic vessel having one end fixed and the other end free, a plate mounted adjacent the free end of said vessel and immovable with reference to the fixed end of said vessel, a plate movably mounted adjacent the fixed end of said vessel but immovably associated with the free end of said vessel whereby said movably. mounted plate is moved as said vessel is elongated, a compression spring mounted between said plates and encircling said vessel, thereby resisting elongation of said vessel, operating means connected with the said movably mounted plate, and means for passing a fluid under pressure into said vessel whereby said vessel is elongated;

2. A controller comprising an elastic cylinder, .a disk positioned against each end of said cylinder, a coil spring encircling diaphragm consaid cylinder and projecting beyond each end thereof, a late ositioned against each end of said coi said disks, plates, cylinder and coil being substantially coaxial and each disk being stationary with reference to the plate farthest from said disk; means for holding one of said disks stationary, operating means connected with the other disk, and means for passing a fluid under pressure into the cylinder.

3. A controller comprising an elastic cylinder, a disk positioned against each end of said cylinder, a coil spring encircling said cylinder and projecting beyond each end thereof, a late ositioned against each end of said coi sai disks, plates, cylinder and coil being substantially coaxial; one of said disks being fixed in position, and being associated relatively immovably with the adjacent vessel end and with the remote plate, the other disk being immovable with reference to the other vessel end and with reference to the other plate, operatin means connected with the latter disk, an means for passing a. fluid under pressure into the cylinder.

.4. A controller comprising an elastic vessel havin one end fixed and the other end free, a p ate positioned adjacent the fixed end of said vessel and immovably connected with the free end of said vessel, a second plate positioned adjacent the free end of said vessel and immovably connected with the fixed end of said vessel, a compression spring mounted between said plates and encircling said vessel, operating means connected to the free end of said vessel, and means for passing a fluid under pressure into said vessel.

In testimony whereof, I hereunto set my hand.

VINCENT V. VEENSCHOTEN.

Witnesses:

E. W. NIoK, WILLIAM E. Emma. 

